The BMC FM338/21 motorcycle air filter for the Yamaha YFM 660 Raptor uses low-viscosity oil-impregnated cotton gauze filter media to provide increased airflow compared with paper filters. Its Full Molding construction uses soft rubber to form a single piece without bonded joints at the corners, reducing the risk of breakage.
- Type: Motorcycle air filter
- Filter media: Low-viscosity oil-impregnated cotton gauze
- Construction: Single piece of soft rubber without bonded joints at the corners
- Technology: Full Molding
- Compatibility: Yamaha YFM 660 Raptor